EPA 608 Practice Test
Disposable cylinders must be:
Discarded.
After the installation of any type of system, the unit should first be:
Pressurized with an inert gas and leak checked.
Which HC refrigerant is allowed for use in new domestic small appliances?
R-600a
Which of the following best describes the refrigerant recovery process from an R-123 system?
Start with liquid removal and then switch over to vapor recovery.
Recovery equipment must be;
certified by an EPA - approved testing laboratory
When a system is in deep vacuum, you should never:
energize the compressor.
A high-pressure appliance containing 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of:
0 inches of vacuum
A high-pressure appliance containing 210 lbs. of R-407c refrigerant must be evacuated (recovered) to a level of;
10 inches of vacuum
When removing oil from a low‐pressure system, a temperature of what must be attained?
130 degrees F.
The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is:
25 mm of Hg absolute.
Leaks must be repaired on industrial process and refrigeration units with a 50- pound charge or greater when the annualized leak rate reaches _____ or more
30%
When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of;
36 degrees.
The standard for machine room safety is:
ASHRAE 15
A small appliance is defined by the EPA as:
Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs. or less of refrigerant.
Before shipping any used refrigerant cylinders, what standards should be checked?
Department of transportation
Corp loss, eye disease and skin cancer have been attributed to:
Depletion of Stratospheric ozone
Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by:
EPA approved laboratory
A refrigerant cylinder designed to hold recovered refrigerant has a:
Grey body and yellow top
The EPA requirement for repairing leaks on small appliances states that:
Leaks should be repaired whenever possible
What type of equipment can be worked on with Type III certification?
Low-pressure
After the refrigerant has been recovered, which of the following should be used to flush the system?
Nitrogen
Which of the following refrigerant has a GWP of "1"?
R-1233zd
When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should;
Run the compressor and recover from the high side of the system only.
EAP regulation state that removal of witch component constitutes a "major repair"?
compressor
To repair a chiller operating with R-22, the technician:
must have a Type II certification.
If a leaking appliance with a regulated refrigerant is not going to be repaired it must be:
retrofitted or retried within 12 months
The chlorine in CFCs and HCFCs:
will not dissolve in water
The use and release of CFCs and HCFCs has a far reaching effect on...
The stratosphere
Technicians who perform sealed system service on small appliances must have;
Type 1 or Universal Certification
Water must be circulated through the tubes when evacuating refrigerant in order to prevent:
Water from freezing.
